annotate idavoll/storage.py @ 120:8892331314c8

Change Node.add_subscription() to return a Failure when a subscription already exists or return nothing on success. Added get_subscription(). Return Failure from Node.remove_subscription() when subscription does not exist.
author Ralph Meijer <ralphm@ik.nu>
date Tue, 12 Apr 2005 12:20:01 +0000
parents 3e7a7426f518
children 0d7b95fb2549
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1 from zope.interface import Interface
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2 from twisted.words.protocols.jabber import jid
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3
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4 class Error(Exception):
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5 msg = None
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6
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7 class NodeNotFound(Error):
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8 pass
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9
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10 class NodeExists(Error):
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11 pass
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12
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13 class SubscriptionNotFound(Error):
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14 pass
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15
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16 class SubscriptionExists(Error):
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17 pass
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18
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19 class IStorage(Interface):
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20 """ Storage interface """
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21
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22 def get_node(self, node_id):
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23 """ Get Node.
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24
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25 @param node_id: NodeID of the desired node.
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26 @type node_id: L{str}
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27 @return: deferred that returns a L{Node} object.
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28 """
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29
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30 def get_node_ids(self):
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31 """ Return all NodeIDs.
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32
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33 @return: deferred that returns a list of NodeIDs (L{str}).
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34 """
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35
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36 def create_node(self, node_id, owner, config = None, type='leaf'):
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37 """ Create new node.
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38
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39 The implementation should make sure, the passed owner JID is stripped
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40 of the resource (e.g. using C{owner.userhostJID()}).
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41
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42 @param node_id: NodeID of the new node.
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43 @type node_id: L{str}
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44 @param owner: JID of the new nodes's owner.
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45 @type owner: L{jid.JID}
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46 @param config: Configuration
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47 @param type: Node type. Can be either C{'leaf'} or C{'collection'}.
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48 @return: deferred that fires on creation.
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49 """
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50
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51 def delete_node(self, node_id):
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52 """ Delete a node.
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53
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54 @param node_id: NodeID of the new node.
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55 @type node_id: L{str}
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56 @return: deferred that fires on deletion.
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57 """
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58
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59 def get_affiliations(self, entity):
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60 """ Get all affiliations for entity.
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61
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62 The implementation should make sure, the passed owner JID is stripped
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63 of the resource (e.g. using C{owner.userhostJID()}).
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64
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65 @param entity: JID of the entity.
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66 @type entity: L{jid.JID}
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67 @return: deferred that returns a L{list} of tuples of the form
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68 C{(node_id, affiliation)}, where C{node_id} is of the type
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69 L{str} and C{affiliation} is one of C{'owner'}, C{'publisher'}
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70 and C{'outcast'}.
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71 """
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72
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73 def get_subscriptions(self, entity):
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74 """ Get all subscriptions for an entity.
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75
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76 The implementation should make sure, the passed owner JID is stripped
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77 of the resource (e.g. using C{owner.userhostJID()}).
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78
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79 @param entity: JID of the entity.
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80 @type entity: L{jid.JID}
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81 @return: deferred that returns a L{list} of tuples of the form
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82 C{(node_id, subscriber, state)}, where C{node_id} is of the
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83 type L{str}, C{subscriber} of the type {jid.JID}, and
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84 C{state} is C{'subscribed'} or C{'pending'}.
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85 """
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86
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87
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88 class INode(Interface):
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89 """ """
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90 def get_type(self):
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91 """ Get node's type.
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92
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93 @return: C{'leaf'} or C{'collection'}.
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94 """
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95
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96 def get_configuration(self):
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97 """ Get node's configuration.
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98
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99 The configuration must at least have two options:
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100 C{pubsub#persist_items}, and C{pubsub#deliver_payloads}.
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101
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102 @return: L{dict} of configuration options.
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103 """
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104
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105 def get_meta_data(self):
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106 """ Get node's meta data.
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107
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108 The meta data must be a superset of the configuration options, and
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109 also at least should have a C{pubsub#node_type} entry.
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110
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111 @return: L{dict} of meta data.
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112 """
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113
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114 def set_configuration(self, options):
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115 """ """
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116
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117 def get_affiliation(self, entity):
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118 """ Get affiliation of entity with this node.
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119
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120 @param entity: JID of entity.
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121 @type entity: L{jid.JID}
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122 @return: deferred that returns C{'owner'}, C{'publisher'}, C{'outcast'}
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123 or C{None}.
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124 """
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125
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126 def get_subscription(self, subscriber):
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127 """ Get subscription to this node of subscriber.
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128
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129 @param subscriber: JID of the new subscriptions' entity.
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130 @type subscriber: L{jid.JID}
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131 @return: deferred that returns the subscription state (C{'subscribed'},
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132 C{'pending'} or C{None}).
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133 """
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134
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135 def add_subscription(self, subscriber, state):
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136 """ Add new subscription to this node with given state.
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137
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138 @param subscriber: JID of the new subscriptions' entity.
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139 @type subscriber: L{jid.JID}
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140 @param state: C{'subscribed'} or C{'pending'}
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141 @type state: L{str}
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142 @return: deferred that fires on subscription.
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143 """
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144
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145 def remove_subscription(self, subscriber):
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146 """ Remove subscription to this node.
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147
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148 @param subscriber: JID of the subscriptions' entity.
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149 @type subscriber: L{jid.JID}
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150 @return: deferred that fires on removal.
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151 """
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152
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153 def get_subscribers(self):
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154 """ Get list of subscribers to this node.
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155
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156 Retrieves the list of entities that have a subscription to this
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157 node. That is, having the state C{'subscribed'}.
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158
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159 @return: a deferred that returns a L{list} of L{jid.JID}s.
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160 """
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161
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162 def is_subscribed(self, subscriber):
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163 """ Returns whether subscriber has a subscription to this node.
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164
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165 Only returns C{True} when the subscription state (if present) is
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166 C{'subscribed'}.
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167
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168 @param subscriber: JID of the subscriptions' entity.
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169 @type subscriber: L{jid.JID}
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170 @return: deferred that returns a L{bool}.
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171 """
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172
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173 class ILeafNode(Interface):
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174 """ """
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175 def store_items(self, items, publisher):
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176 """ """
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177
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178 def remove_items(self, item_ids):
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179 """ """
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180
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181 def get_items(self, max_items=None):
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182 """ """
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183
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184 def get_items_by_id(self, item_ids):
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185 """ """
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186
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187 def purge(self):
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188 """ """
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189
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190
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191 class ISubscription(Interface):
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192 """ """